Printer&#39;s blanket and method of making the same



Patented Sept. 16, 1930 PATENT OFFICE GEORGE L. wILLsoN,

OF NEW YORK, N. Y.

PRINTERS BLANKET AND METHOD OF MAKING THE SAME No Drawing. Application filed May 25,

My invention relates to a new and improved printers blanket and a method of making the same.

One of the objects of my invention is to make an improved printers blanket which shall have great resilience and long life and which is very flexible and bendable so that it will not crack as readily as the types of printers blankets which are now in use.

Another object of my invention is to provide a printers blanket made of cork particles connected to a suitable thin fabric base, this material having great resilience. flexibility and long life.

Another object of my invention is to provide a printers blanket comprising cork particles connected to a fabric base by means of a mixture of oxidized linseed oil and a suitable vulcanized oil.

, Other objects of my invention will be specified in the following description which also contains a preferred embodiment thereof, it being understood that the above general statement of the objects of my invention is intended to generally explain the same without limiting it in any manner and that my invention is not limited to the specific single example later disclosed.

It has heretofore been proposed to make blankets for printing presses, especially for rotary printing presses of ordinary linoleum or insole material. In blankets of the type previously known the cork particles were connected to a thin fabric base by means of oxidized linseed oil.

According to my invention a part of the oxidized linseed oil is substituted by a suit- 7 able proportion of vulcanized or sulphonated oil, namely, by an oil which has been caused 40 to combine with sulphur.

A cork blanket in which the cork particles have been connected to each other and to the fabric base by a combination of oxidized oil and a sulphonated oil shows superior resilience, has much greater life and is much more flexible so that it can be bent without cracking the cork layer. This combination of oxidized oil and sulphonated oil constitutes substantially the only binder for connecting the cork to the fabric base, and the working 1928. Serial No. 280,653.

face of the completed blanket consists substantially wholly of cork. That is, while it is possible that small quantities of other materials might be added without departing from the invention, the invention is particularly directed to a printers blanket in which the working face consists of cork substantially free from other materials, and in which the binder consists substantially wholly of the combination of oxidized oil and sulphonated oil.

A preferred example of my invention is as follows; although I do not wish to be limited to the materials or other details specified in the said example.

Any suitable drying oil, such as linseed oil, is vulcanized by heating it with sulphur in the well-known manner. This vulcanized product is then mixed with the oxidized or thickened linseed oil and the cork particles in the well-known manner, and the mixture is spread upon, and caused to set upon a suitable fabric base. The vulcanized linseed oil may comprise fifteen percent of the total quantity of oil utilized. Well-known machines may be utilized for this purpose.

I prefer using two blankets so made and of different thickness (so that they are not interchangeable) in combination with a topdraw sheet of any suitable type, to pack the impression cylinder of a printing press. For

example, one of the blankets could have a thickness of .080 inch and the other could have a thickness of .060 inch.

These blankets have uniform life, so that both wear uniformly, when used as components of a single packing.

I have shown a preferred embodiment of my invention. but it is clear that numerous changes and omissions may be made without departing from the spirit of my invention.

I claim:

-A printers blanket comprising a fabric base having a working face consisting of cork particles connected thereto by a mixture colnsisting of an oxidized oil and a vulcanized o1 In testimony whereof I aflix my signature.

GEORGE L. WILLSON. 

